Explanation:
Far across the universe, an unusual
cluster of galaxies has been evolving.
A diverse group of galaxies populate this cluster,
including, on the left, an unusual galaxy showing an
equatorial polar ring and a
large spiral.
Above looms a large
elliptical galaxy.
The reason for the small size of galaxies on the
right is not yet known - these galaxies might be smaller
or might just lie even farther in the distance.
Almost every spot in
this picture is a galaxy. Studying
distant clusters
like this may help astronomers better understand
when and how these cosmic giants formed.